A favourite quote from the Spectator - still valid 300 years on :-
There are several Arts which all Men are in some measure Masters of, without having been at the Pains of learning them. Every one that speaks or reasons is a Grammarian and a Logician, tho’ he may be wholly unacquainted with the Rules of Grammar and Logick, as they are delivered in Books and Systems.
The Spectator. June 8th 1711